Title :
An improved OPAST algorithm for spatio-temporal multiuser detection technique based on subspace tracking
Author :
Zhang, Hui ; Ren, Guangliang ; Zhang, Huining ; Zhang, Jin
Author_Institution :
Nat. Key Lab. of ISN, Xidian Univ., Xi´´an
Abstract :
An improved OPAST algorithm for spatio-temporal multiuser detection technique is proposed to increase the system capacity and improve the SNR in DS-CDMA systems employing the antenna arrays. The improved OPAST algorithm called newOPAST is based on the OPAST algorithm and can be applied in the overloaded DS-CDMA systems. Simulation results show that the newOPAST algorithm has low complexity and a stable global convergence property, and its performance is close to that of the classical algorithms with high complexity in the blind spatio-temporal multiuser detection
Keywords :
antenna arrays; code division multiple access; computational complexity; convergence; multiuser detection; spread spectrum communication; DS-CDMA system; OPAST algorithm; antenna array; computational complexity; convergence property; spatiotemporal multiuser detection technique; subspace tracking; Additive white noise; Antenna arrays; Convergence; Gaussian noise; Laboratories; Multiaccess communication; Multiuser detection; Noise robustness; Receiving antennas; Statistics;
Conference_Titel :
Communications Systems, 2004. ICCS 2004. The Ninth International Conference on
Conference_Location :
Singapore, China
Print_ISBN :
0-7803-8549-7
DOI :
10.1109/ICCS.2004.1359407
